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Spherical Lenses

We provides five kinds of spheric lens forms, or shapes, that determine the imaging Characteristics of the lenses, they are plano-convex, plano-concave ,Double-convex, Double-concave and Meniscus.
· Plano-convex lens has a positive focal length, which makes it ideal for collecting and focusing light for many imaging applications..
· Plano-concave lens has a negative focal length and is used for image reductinon or to spread light.
· Double-convex lens has a positive focal length and is useful for 1:1 imaging and in multielement systems. also known as biconvex or equiconvex.
· Double-concave lens has a negative focal length and is useful for 1:1 imaging and in multielement systems. also known as biconcave or equiconcave.
· Meniscus lense has a positive or negative focal length, it forms a real or virtual image of objects.

Product Specifications

Material

BK7, K9, Fused Silica, SF10, Silicon,   CaF2, Sapphire, etc.

Typical Diameter (Φmm)

10.0, 12.7, 15.0, 20.0, 25.4, 30.0,   50.8, etc.

Diameter Tolerance (mm)

+0.0/-0.02 (General), +0.0/-0.02 (High   Precision)

Paraxial Focal length tolerance (mm)

±2%

Centration

<3 arc min

Clear Aperture

>80% (Small Size), >95% (Large   Size)

Surface Figure (per 25mm@632.8nm)

<1.5λ, (General), <λ/4 (High Precision)

IRR (@632.8nm)

<λ/4 (General), <λ/10 (High Precision)

Surface Quality

60/40 (General), 10/5(High Precision)

Bevel (face width × 45°)

<0.25mm

Coating

uncoated, AR,HR, PR Coating, etc.


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